@x-varlesh-x Hello, great work! ;) What about better look (more flat) for icons of these apps:
Atom (seems in menu is ok, but in window buttons in panel applet is not flat, I can send screenshot if you want,
Bitwig studio (no icon in window buttons in panel applet),
Dbeaver,
Mpv (in menu ok, but original ugly icon in window buttons),
Qjackctl (in menu ok, but original ugly icon in window buttons).